PHP Upload PDF to Google Drive API

Question

I have website created in PHP. Basically it is a send document kind of project. It uses a document store in Azure I will call and send it into Azure. Now I want to send in email as well as store in Google drive.

So it should be stored to drive with public access. I have create following code. It works properly I don't want any input from user.

  $client->setAccessToken($_SESSION['accessToken']);
    $service = new Google_DriveService($client);
    $finfo = finfo_open(FILEINFO_MIME_TYPE);
    $file = new Google_DriveFile();
    foreach ($files as $file_name) {
        $file_path = 'files/'.$file_name;
        $mime_type = finfo_file($finfo, $file_path);
        $file->setTitle($file_name);
        $file->setDescription('This is a '.$mime_type.' document');
        $file->setMimeType($mime_type);
        $service->files->insert(
            $file,
            array(
                'data' => file_get_contents($file_path),
                'mimeType' => $mime_type
            )
        );
    }
    finfo_close($finfo);

I want upload from Azure URL using cURL or using API. When mail send it is automatically uploaded to drive at the same time.

Question Update

I have function to send a mail this is work perfectly. I would like to store an attachment to google drive and retrieve path store that path in to database.

This all work will be based on API no user interaction required. That file is PDF in formate and not specific bytes its different as per data of file.

Issue :

When I upload a file to Drive original file name is rename to untitled. Here is code.

function uploadFile($credentials, $filename, $targetPath)
{

    global $GAPIS;
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $GAPIS . 'upload/drive/v2/files?uploadType=media');

    curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
    //curl_setopt($ch, CURLOPT_POSTFIELDS, array("title" =>"newfile.txt"));
    curl_setopt($ch, CURLOPT_POSTFIELDS, file_get_contents($filename));

    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER,
            array('Content-Type : text/plain', 'Content-Length:' . filesize($filename),
                    'Authorization: Bearer ' . getAccessToken($credentials))
    );

    $postResult = curl_exec($ch);
    curl_close($ch);

    return json_decode($postResult, true);
}

==========================================

Updated code (Issue with Added code but still getting issue with Untitle.pdf in drive)

==========================================

<?php

$GAPIS = 'https://www.googleapis.com/';
$GAPIS_AUTH = $GAPIS . 'auth/';
$GOAUTH = 'https://accounts.google.com/o/oauth2/';

$CLIENT_ID = '709846732498-xxxxxxxx';
$CLIENT_SECRET = 'XXXXXXXXXXXXXX';
$REDIRECT_URI = 'http' . ($_SERVER['SERVER_PORT'] == 80 ? '' : 's') . '://' . $_SERVER['SERVER_NAME'] . $_SERVER['SCRIPT_NAME'];
$SCOPES = array($GAPIS_AUTH . 'drive', $GAPIS_AUTH . 'drive.file', $GAPIS_AUTH . 'userinfo.email', $GAPIS_AUTH . 'userinfo.profile');
$STORE_PATH = 'credentials.json';

function uploadFile($credentials, $filename, $targetPath)
{

    global $GAPIS;
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $GAPIS . 'upload/drive/v2/files?uploadType=media');

    curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, file_get_contents($filename));
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER,
            array('Content-Type : application/pdf', 'Content-Length:' . filesize($filename),
                    'Authorization: Bearer ' . getAccessToken($credentials))
    );

    $postResult = curl_exec($ch);
    curl_close($ch);

    return json_decode($postResult, true);
}

function getStoredCredentials($path)
{

    $credentials = json_decode(file_get_contents($path), true);

    if (isset($credentials['refresh_token']))
        return $credentials;

    $expire_date = new DateTime();
    $expire_date->setTimestamp($credentials['created']);
    $expire_date->add(new DateInterval('PT' . $credentials['expires_in'] . 'S'));

    $current_time = new DateTime();

    if ($current_time->getTimestamp() >= $expire_date->getTimestamp())
    {
        $credentials = null;
        unlink($path);
    }

    return $credentials;
}

function storeCredentials($path, $credentials)
{

    $credentials['created'] = (new DateTime())->getTimestamp();
    file_put_contents($path, json_encode($credentials));
    return $credentials;
}

function requestAuthCode()
{

    global $GOAUTH, $CLIENT_ID, $REDIRECT_URI, $SCOPES;
    $url = sprintf($GOAUTH . 'auth?scope=%s&redirect_uri=%s&response_type=code&client_id=%s&approval_prompt=force&access_type=offline',
            urlencode(implode(' ', $SCOPES)), urlencode($REDIRECT_URI), urlencode($CLIENT_ID)
    );
    header('Location:' . $url);
}

function requestAccessToken($access_code)
{

    global $GOAUTH, $CLIENT_ID, $CLIENT_SECRET, $REDIRECT_URI;
    $url = $GOAUTH . 'token';
    $post_fields = 'code=' . $access_code . '&client_id=' . urlencode($CLIENT_ID) . '&client_secret=' . urlencode($CLIENT_SECRET)
            . '&redirect_uri=' . urlencode($REDIRECT_URI) . '&grant_type=authorization_code';

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
    curl_setopt($ch, CURLOPT_POST, true);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_URL, $url);

    $result = curl_exec($ch);

    curl_close($ch);

    return json_decode($result, true);
}

function getAccessToken($credentials)
{

    $expire_date = new DateTime();
    $expire_date->setTimestamp($credentials['created']);
    $expire_date->add(new DateInterval('PT' . $credentials['expires_in'] . 'S'));

    $current_time = new DateTime();

    if ($current_time->getTimestamp() >= $expire_date->getTimestamp())
        return $credentials['refresh_token'];
    else
        return $credentials['access_token'];

}

function authenticate()
{

    global $STORE_PATH;

    if (file_exists($STORE_PATH))
        $credentials = getStoredCredentials($STORE_PATH);
    else
        $credentials = null;

    if (!(isset($_GET['code']) || isset($credentials)))
        requestAuthCode();

    if (!isset($credentials))
        $credentials = requestAccessToken($_GET['code']);

    if (isset($credentials) && isset($credentials['access_token']) && !file_exists($STORE_PATH))
        $credentials = storeCredentials($STORE_PATH, $credentials);

    return $credentials;
}

$credentials = authenticate();

$result = uploadFile($credentials, 'example.pdf', '');

if (!isset($result['id']))
    throw new Exception(print_r($result));
else
    echo 'File copied successfuly (file Id: ' . $result['id'] . ')';

echo '<pre>'; print_r($result);

Answer 1

going by https://developers.google.com/drive/api/v3/simple-upload , this should work:

<?php
$ch = curl_init ();
curl_setopt_array ( $ch, array (
        CURLOPT_URL => 'https://www.googleapis.com/upload/drive/v3/files?uploadType=media',
        CURLOPT_HTTPHEADER => array (
                'Content-Type: application/pdf', // todo: runtime detection?
                'Authorization: Bearer [YOUR_AUTH_TOKEN]' 
        ),
        CURLOPT_POST => 1,
        CURLOPT_POSTFIELDS => file_get_contents ( '/path/to/file.pdf' ),
        CURLOPT_RETURNTRANSFER => 1 
) );
try {
    if (false === ($resp = curl_exec ( $ch ))) {
        throw new \RuntimeException ( 'curl error ' . curl_errno ( $ch ) . ": " . curl_error ( $ch ) );
    }
    $parsed = json_decode ( $resp, true );
    if (! $parsed || $parsed ['code'] !== 200) {
        throw new \RuntimeException ( 'google api error: ' . $resp );
    }
} finally{
    curl_close ( $ch );
}
var_dump($resp);